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Installing Gateways
In multi-story buildings, each floor typically contains an independent network segment called a spur. Spurs can
be joined via network gateways to a trunk network (RS-485 or Ethernet) installed in a riser linking all floors
together. The trunk typically connects to the System Manager head-end software or to a BMS enabling full
access to the entire system.
All circuits and cables connected to gateways must be SELV/Class 2 (UL).
B
Port 1
Port 2
Port 1
Port 2
1.
For RS-485 networks, terminate both trunk and spur connections to gateway.
a.
Spur (Floor sub-network) is terminated to Port 1.
b.
Trunk (Building backbone) is terminated to Port 2.
2.
An RS-485 gateway is powered from the DyNet network spur connected to
Port 1. Up to 150mA of power from the DyNet network on Port 1 is fed to Port
2, so providing there is sufficient power available on the spur, it is not
necessary to provide a network power supply for the trunk network.
3.
When implementing repeaters for long runs, connect the link to Port 2 of
both bridges. Shielded cable must be used for long runs (refer to
Recommended cable types). Provide additional DyNet power supplies where
required and ensure end-of-line resistors are in place.
4.
DDNG485 bridges are required when there are more than
100 devices on a run, or the current may exceed the cable limit.
5.
DDNG485 Port 2 is used for DMX Receive/Transmit or for third-party integration.
16
th
February 2022
DyNet RS-485 trunk network and DyNet RS-485 spur network
Ethernet trunk network and DyNet RS-485 spur network
RS-485 SPUR
RS-485 SPUR
RS-485 SPUR
RS-485 SPUR
RS-485 Gateway with third party integration options
Dynalite Hardware
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Installation Guide
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Page 11
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www.lighting.philips.com/dynalite
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